The MELPAS MCS5000 can use to touchkey controller but touchkey is
implemented to driver separated with original MCS5000 touchscreen
driver. This also supports MCS5080 touchkey.
Signed-off-by: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
---
drivers/input/keyboard/Kconfig | 12 ++
drivers/input/keyboard/Makefile | 1 +
drivers/input/keyboard/mcs_touchkey.c | 245 +++++++++++++++++++++++++++++++++
include/linux/i2c/mcs.h | 36 +++++
4 files changed, 294 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/keyboard/mcs_touchkey.c
create mode 100644 include/linux/i2c/mcs.h
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index d8fa5d7..c748093 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -297,6 +297,18 @@ config KEYBOARD_MAX7359
To compile this driver as a module, choose M here: the
module will be called max7359_keypad.
+config KEYBOARD_MCS
+ tristate "MELFAS MCS Touchkey"
+ depends on I2C
+ help
+ Say Y here if you have the MELFAS MCS5000/5080 touchkey controller
+ chip in your system.
+
+ If unsure, say N.
+
+ To compile this driver as a module, choose M here: the
+ module will be called mcs_touchkey.
+
config KEYBOARD_IMX
tristate "IMX keypad support"
depends on ARCH_MXC
diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
index 4596d0c..0a16674 100644
--- a/drivers/input/keyboard/Makefile
+++ b/drivers/input/keyboard/Makefile
@@ -26,6 +26,7 @@ obj-$(CONFIG_KEYBOARD_LOCOMO) += locomokbd.o
obj-$(CONFIG_KEYBOARD_MAPLE) += maple_keyb.o
obj-$(CONFIG_KEYBOARD_MATRIX) += matrix_keypad.o
obj-$(CONFIG_KEYBOARD_MAX7359) += max7359_keypad.o
+obj-$(CONFIG_KEYBOARD_MCS) += mcs_touchkey.o
obj-$(CONFIG_KEYBOARD_NEWTON) += newtonkbd.o
obj-$(CONFIG_KEYBOARD_OMAP) += omap-keypad.o
obj-$(CONFIG_KEYBOARD_OPENCORES) += opencores-kbd.o
diff --git a/drivers/input/keyboard/mcs_touchkey.c b/drivers/input/keyboard/mcs_touchkey.c
new file mode 100644
index 0000000..d70e048
--- /dev/null
+++ b/drivers/input/keyboard/mcs_touchkey.c
@@ -0,0 +1,245 @@
+/*
+ * mcs_touchkey.c - Touchkey driver for MELFAS MCS5000/5080 controller
+ *
+ * Copyright (C) 2010 Samsung Electronics Co.Ltd
+ * Author: HeungJun Kim <riverful.kim@xxxxxxxxxxx>
+ * Author: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/i2c/mcs.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+
+/* MCS5000 Touchkey */
+#define MCS5000_TOUCHKEY_STATUS 0x04
+#define MCS5000_TOUCHKEY_STATUS_PRESS 7
+#define MCS5000_TOUCHKEY_FW 0x0a
+#define MCS5000_TOUCHKEY_BASE_VAL 0x61
+
+/* MCS5080 Touchkey */
+#define MCS5080_TOUCHKEY_STATUS 0x00
+#define MCS5080_TOUCHKEY_STATUS_PRESS 3
+#define MCS5080_TOUCHKEY_FW 0x01
+#define MCS5080_TOUCHKEY_BASE_VAL 0x1
+
+enum mcs_touchkey_type {
+ MCS5000_TOUCHKEY,
+ MCS5080_TOUCHKEY,
+};
+
+struct mcs_touchkey_chip {
+ unsigned int status_reg;
+ unsigned int pressbit;
+ unsigned int press_invert;
+ unsigned int baseval;
+};
+
+struct mcs_touchkey_data {
+ struct i2c_client *client;
+ struct input_dev *input_dev;
+ struct mcs_touchkey_chip chip;
+ unsigned short *keycodes;
+ unsigned int key_code;
+ unsigned int key_val;
+};
+
+static irqreturn_t mcs_touchkey_interrupt(int irq, void *dev_id)
+{
+ struct mcs_touchkey_data *data = dev_id;
+ struct mcs_touchkey_chip *chip = &data->chip;
+ struct i2c_client *client = data->client;
+ struct input_dev *input = data->input_dev;
+ unsigned int key_val;
+ unsigned int pressed;
+ int val;
+
+ val = i2c_smbus_read_byte_data(client, chip->status_reg);
+ if (val < 0) {
+ dev_err(&client->dev, "Failed to i2c read error[%d]\n", val);
+ goto out;
+ }
+
+ pressed = (val & (1 << chip->pressbit)) >> chip->pressbit;
+ if (chip->press_invert)
+ pressed ^= chip->press_invert;
+
+ /* key_val is 0 when releases, so we should use key_val of press. */
+ if (pressed) {
+ key_val = val & (0xff >> (8 - chip->pressbit));
+ if (!key_val)
+ goto out;
+ key_val -= chip->baseval;
+ data->key_code = data->keycodes[key_val];
+ data->key_val = key_val;
+ }
+
+ input_event(input, EV_MSC, MSC_SCAN, data->key_val);
+ input_report_key(input, data->key_code, pressed ? 1 : 0);
+ input_sync(input);
+
+ dev_dbg(&client->dev, "key %d %d %s\n", data->key_val, data->key_code,
+ pressed ? "pressed" : "released");
+
+ out:
+ return IRQ_HANDLED;
+}
+
+static int __devinit mcs_touchkey_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ const struct mcs_platform_data *pdata;
+ struct mcs_touchkey_data *data;
+ struct input_dev *input_dev;
+ unsigned short *keycodes;
+ unsigned int fw_reg;
+ int ret;
+ int i;
+
+ pdata = client->dev.platform_data;
+ if (!pdata) {
+ dev_err(&client->dev, "no platform data defined\n");
+ return -EINVAL;
+ }
+
+ data = kzalloc(sizeof(struct mcs_touchkey_data), GFP_KERNEL);
+ keycodes = kzalloc(sizeof(*keycodes) * (pdata->key_maxval + 1),
+ GFP_KERNEL);
+ input_dev = input_allocate_device();
+ if (!data || !keycodes || !input_dev) {
+ dev_err(&client->dev, "Failed to allocate memory\n");
+ ret = -ENOMEM;
+ goto err_free_mem;
+ }
+
+ data->client = client;
+ data->input_dev = input_dev;
+ data->keycodes = keycodes;
+
+ if (id->driver_data == MCS5000_TOUCHKEY) {
+ data->chip.status_reg = MCS5000_TOUCHKEY_STATUS;
+ data->chip.pressbit = MCS5000_TOUCHKEY_STATUS_PRESS;
+ data->chip.baseval = MCS5000_TOUCHKEY_BASE_VAL;
+ fw_reg = MCS5000_TOUCHKEY_FW;
+ } else {
+ data->chip.status_reg = MCS5080_TOUCHKEY_STATUS;
+ data->chip.pressbit = MCS5080_TOUCHKEY_STATUS_PRESS;
+ data->chip.press_invert = 1;
+ data->chip.baseval = MCS5080_TOUCHKEY_BASE_VAL;
+ fw_reg = MCS5080_TOUCHKEY_FW;
+ }
+
+ ret = i2c_smbus_read_byte_data(client, fw_reg);
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed to i2c read error[%d]\n", ret);
+ goto err_free_mem;
+ }
+ dev_info(&client->dev, "Firmware version: %d\n", ret);
+
+ input_dev->name = "MELPAS MCS Touchkey";
+ input_dev->id.bustype = BUS_I2C;
+ input_dev->dev.parent = &client->dev;
+ input_dev->evbit[0] = BIT_MASK(EV_KEY);
+ if (!pdata->no_autorepeat)
+ input_dev->evbit[0] |= BIT_MASK(EV_REP);
+ input_dev->keycode = keycodes;
+ input_dev->keycodesize = sizeof(*keycodes);
+ input_dev->keycodemax = pdata->key_maxval + 1;
+
+ for (i = 0; i < pdata->keymap_size; i++) {
+ int val;
+ int code;
+
+ val = MCS_KEY_VAL(pdata->keymap[i]);
+ code = MCS_KEY_CODE(pdata->keymap[i]);
+ keycodes[val] = code;
+ __set_bit(code, input_dev->keybit);
+ }
+
+ input_set_capability(input_dev, EV_MSC, MSC_SCAN);
+ input_set_drvdata(input_dev, data);
+
+ if (pdata->cfg_pin)
+ pdata->cfg_pin();
+
+ ret = request_threaded_irq(client->irq, NULL, mcs_touchkey_interrupt,
+ IRQF_TRIGGER_FALLING, client->dev.driver->name, data);
+
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed to register interrupt\n");
+ goto err_free_mem;
+ }
+
+ ret = input_register_device(input_dev);
+ if (ret < 0)
+ goto err_free_irq;
+
+ i2c_set_clientdata(client, data);
+
+ return 0;
+
+err_free_irq:
+ free_irq(client->irq, data);
+err_free_mem:
+ input_free_device(input_dev);
+ kfree(keycodes);
+ kfree(data);
+ return ret;
+}
+
+static int __devexit mcs_touchkey_remove(struct i2c_client *client)
+{
+ struct mcs_touchkey_data *data = i2c_get_clientdata(client);
+
+ free_irq(client->irq, data);
+ input_unregister_device(data->input_dev);
+ kfree(data->keycodes);
+ kfree(data);
+
+ return 0;
+}
+
+static const struct i2c_device_id mcs_touchkey_id[] = {
+ { "mcs5000_touchkey", MCS5000_TOUCHKEY },
+ { "mcs5080_touchkey", MCS5080_TOUCHKEY },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, mcs_touchkey_id);
+
+static struct i2c_driver mcs_touchkey_driver = {
+ .probe = mcs_touchkey_probe,
+ .remove = __devexit_p(mcs_touchkey_remove),
+ .driver = {
+ .name = "mcs_touchkey",
+ },
+ .id_table = mcs_touchkey_id,
+};
+
+static int __init mcs_touchkey_init(void)
+{
+ return i2c_add_driver(&mcs_touchkey_driver);
+}
+
+static void __exit mcs_touchkey_exit(void)
+{
+ i2c_del_driver(&mcs_touchkey_driver);
+}
+
+module_init(mcs_touchkey_init);
+module_exit(mcs_touchkey_exit);
+
+/* Module information */
+MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>");
+MODULE_AUTHOR("HeungJun Kim <riverful.kim@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("Touchkey driver for MELFAS MCS5000/5080 controller");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/i2c/mcs.h b/include/linux/i2c/mcs.h
new file mode 100644
index 0000000..ae3225b
--- /dev/null
+++ b/include/linux/i2c/mcs.h
@@ -0,0 +1,36 @@
+/*
+ * mcs.h
+ *
+ * Copyright (C) 2009 - 2010 Samsung Electronics Co.Ltd
+ * Author: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
+ * Author: HeungJun Kim <riverful.kim@xxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#ifndef __LINUX_MCS_H
+#define __LINUX_MCS_H
+
+#define MCS_KEY_MAP(v, c) ((((v) & 0xff) << 16) | ((c) & 0xffff))
+#define MCS_KEY_VAL(v) (((v) >> 16) & 0xff)
+#define MCS_KEY_CODE(v) ((v) & 0xffff)
+
+struct mcs_platform_data {
+ void (*cfg_pin)(void);
+
+ /* touchscreen */
+ int x_size;
+ int y_size;
+
+ /* touchkey */
+ const uint32_t *keymap;
+ unsigned int keymap_size;
+ unsigned int key_maxval;
+ bool no_autorepeat;
+};
+
+#endif /* __LINUX_MCS_H */
--
1.7.0.4
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